What is the correct relation between rate and activation energy?
Correct answer: A. The rate of reaction increases with decreasing activation energy.
- A. The rate of reaction increases with decreasing activation energy.
- B. The rate of reaction is independent of the activation energy.
- C. The rate of reaction decreases with decreasing activation energy.
- D. The rate of reaction increases with increasing activation energy.
Explanation
The rate of a chemical reaction is inversely related to the activation energy. This means that as the activation energy decreases, the rate of the reaction increases because a greater proportion of the reactant molecules possess the necessary energy to overcome the energy barrier to the reaction. Conversely, a higher activation energy means fewer molecules have sufficient energy, resulting in a slower reaction rate. Therefore, the correct relation is that the rate of reaction increases with decreasing activation energy.
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About Reaction Kinetics
Reaction kinetics relates reaction rate to concentration, temperature, surface area and catalysts. Questions cover rate laws, reaction order, rate constants, activation energy and the activated complex, including how a catalyst lowers the activation energy without changing the overall energy change or equilibrium position.
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